In the Hall process, aluminium is produced by the electrolysis of molten `Al_2O_3`. How many second would it take to produce enough aluminium by the Hall process to make a case of 24 cans of auminium soft-drink, if each can uses 5.0g of Al, a current of 9650amp is employed and the current efficiency of the cell is 90%:
A
203.2
B
148.14
C
333
D
6.17
Text Solution
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The correct Answer is:
B
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The electrolysis of acetate solution produces ethane according to reaction: 2CH_3COO^(-) to C_2H_6(g) + 2CO_(2)(g) + 2e^(-) . The current efficiency of the process is 80% . What volume of gases would be produced at 27^@C and 740 torr. If the current of 0.5 amp is passes through the solution for 96.45 min ? (V_(C_2H_6) + V_(CO_2)) =?
Aluminium is stable in air and water inspite of the fact that it is reactive metal. The reason is that a thin film of its oxide, if formed on its surface which makes it passive for further attack. The layer is so useful that in industry, it is purposely deposited by an electrolytric process called anodizing. Reaction of aluminium with oxygen is highyl exothermic and is called thermite reaction 2Al(s)+(3)/(2)O_(2)(g)rarr Al_(2)O_(3)(s), Delta H=-1670 kJ Thermite reaction finds applications in the metallurgical extraction of many metals from their oxides and for welding of metals. The drawback is that to start the reaction, high temperature is required for which an ignition mixture is used. Anodised aluminium is
Aluminium is stable in air and water inspite of the fact that it is reactive metal. The reason is that a thin film of its oxide, if formed on its surface which makes it passive for further attack. The layer is so useful that in industry, it is purposely deposited by an electrolytric process called anodizing. Reaction of aluminium with oxygen is highyl exothermic and is called thermite reaction 2Al(s)+(3)/(2)O_(2)(g)rarr Al_(2)O_(3)(s), Delta H=-1670 kJ Thermite reaction finds applications in the metallurgical extraction of many metals from their oxides and for welding of metals. The drawback is that to start the reaction, high temperature is required for which an ignition mixture is used. Thermite mixture used for welding is
Nitric acid can be produced from NH_(3) in three step process I) 4NH_(3(g))+5O_(2(g))rarr4NO_((g))+6H_(2)O_((g)) II) 2NO_((g))+O_(2(g))rarr2NO_(2(g)) III) 3NO_(2(g))+H_(2)O_((l))rarr2HNO_(3(aq))+NO_((g)) % yield of I, II, III reaction are respectively 50%, 60% and 80%. Then how much volume of NH_(3(g)) at STP is required to produce 2.25 gm of HNO_(3) .
